给定一些 MathML 内容:
<apply>
<eq/>
<ci>c</ci>
<apply>
<plus/>
<ci>a</ci>
<ci>b</ci>
</apply>
</apply>
和
std::map<std::string,std::double> cal;
cal["a"] = 1.;
cal["b"] = 2.;
cal["c"] = 0; // does not matter what c is
我希望评估 MathML 并检索结果。有没有办法做到这一点?